#myInput {
  background-image: url("images/searchicon.png");
  background-position: 10px 12px; /*图片定位 */
  background-repeat: no-repeat; /* 不重复图片 */
  font-size: 16px;
  padding: 12px 20px 12px 40px;
  border: 1px solid #ddd;
  margin-bottom: 12px;
}
#myTable {
  border-collapse: collapse;
  width: 100%;
  border: 1px solid #ddd;
  font-size: 18px;
}
#myTable th,
#myTable td {
  text-align: left;
  padding: 12px;
}
#myTable tr {
  /* 表格添加边框 */
  border-bottom: 1px solid #ddd;
}
#myTable tr.header,
#myTable tr:hover {
  /* 表头及鼠标移动过 tr 时添加背景 */
  background-color: #f1f1f1;
}
